Expose inits for CoreMIDI packets and packet lists about midikit HOT 2 CLOSED

Done. Will be in next release (0.7.3).

from midikit.

As an addendum:

Maybe @_implementationOnly import CoreMIDI - but will the methods become available in a context where the user imports CoreMIDI?

This is exactly how it works which is kind of neat.

• MIDIKitInternals is not vended by any MIDIKit product/library. It's only usable by a consumer if they explicitly import MIDIKitInternals. This is good because generally it's stuff consumers don't need and keeps internals out of sight.
• MIDIKitInternals uses import CoreMIDI (not implementationOnly) exposing some public extensions on Core MIDI types
• Any other MIDIKit targets will use @_implementationOnly import MIDIKitInternals so that they can use its methods without vending them to the consumer
• If the consumer needs MIDIKitInternals, they can both import MIDIKitInternals and import CoreMIDI and then its Core MIDI extensions will become usable

from midikit.